Two opposite mistakes in an after-the-fact review of a terrorist incident are equally damaging. One is to fail to recognize the powerful difference between foresight and hindsight in evaluating how an investigative or intelligence agency should have behaved.

An informant working for the F.B.I. coordinated a 2012 campaign of hundreds of cyberattacks on foreign websites, including some operated by the governments of Iran, Syria, Brazil and Pakistan, according to documents and interviews with people involved in the attacks.

A federal appeals court on Friday overturned the conviction of a prominent computer hacker whose imprisonment had highlighted a growing debate over whether the government is overreaching in its campaign against cybercrime.

An exclusive KrebsOnSecurity investigation detailing how a unit of credit bureau Experian ended up selling consumer records to an identity theft service in the cybercrime underground has prompted a multi-state investigation by several attorneys general, according to wire reports.

Across the world, people who work as system administrators keep computer networks in order â and this has turned them into unwitting targets of the National Security Agency for simply doing their jobs.

In response to a series of questions posed before his confirmation hearing in front of the Senate Armed Services Committee, National Security Agency director nominee Vice Admiral Michael Rogers said that the NSA is working with the White House to create a process to determine what to do with zero-day vulnerabilities that the agency uncovers.